Front arch for locomotive-furnaces.



G. B. MOORE.

FRONT ARCH FOR LOOOMOTIVE FURNACES.

APPLICATION FILED MAY 20, 1907.

Patented Aug. 12, 1913.

2 SHEETS-SHEET '1.

fizzrefar C. B. MOORE.

FRONT ARCH FOR LOGOMOTIVE FURNACES.

APPLICATION FILED MAY 20,1907. 1,@69,9?3 Patented Aug. 12, 1913.

2 SHEETSSHEET 2 i t r CHARLES B. MOORE, OF EVAITSTON, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, 'I'O AMERICAN ARCH COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

Specification of Letters Patent.

FRONT ARCH FOR LOCOMOTIVE-FURNAOES.

Patented Aug. 12,1913.

To all whom it may concern:

Be it known that I, CHARLES E. Moore, a citizen of the United States, and a resident of Evanston, Cook county, Illinois, have invented certain new and useful Improvements in Front Arches for Locomotive- Furnaces, of which thefollowing is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in locomotive boiler furnaces and has special reference to improvements in the construction and arrangement of the front arches in such furnaces.

The invention further and particularly relates to improvements upon the arches which are shown and described in Letters Patent No. 820,450, No. 820,451,-and No. 851,329, and commonly known as "Wade & Nicholson hollow arches.

As represented in said Letters Patent, and as hitherto constructed, it has been the practice to build up \Vade & Nicholson archeswith several rows, tiers, or courses of bricks, extending from side to side of the furnace and supported upon arch tubes extending fill the Space between the side sheets of the 1 appear hereinafter.

diagonally through the furnace. Further, locomotive boiler furnaces of the same type vary in width as much as two or three inches, and because of this 'considerable difiiculty has been experienced in fitting these arches therein. This difiiculty is fre quently augmented by the unevenness of the side sheets, as in locomotive furnaces having corrugated side sheets or wherein 1 said sheets are warped or patched. On account of this variation in the size of the furnaces and the unevenness of the side sheets, it has been frequently necessary to cut down the ends of the bricks in order to I properly fit the arch, whereas in other cases the bricks have failed to completely integration thereof. As before stated the,

arch is supported upon inclined arch tubes extending longitudinally through the furnace. These tubes must be arranged at a considerable distance from the side sheets,

as it is necessary to leave ample space for inspection or repair of the side sheets, and stay bolts. Hence it has been necessary for the bricks of which the arch is composed to overhang the tubes to close the spaces between the same and the sidesheets, which frequently results in the breaking off of the overhanging portions. To avoid this lugs have been provided in the side sheets to support the outer or projecting ends of the bricks. However, this is objectionable, as the lugs are always exposed to the fire and are soon burned oil; further, the lugs must be small and the bricks frequently do not reach them if the furnace is of considerable width. Further, in these arches, when a brick in the body thereof becomes broken, a whole row or tier of bricks must be removed in order to replace the broken brick with a perfect one.

The primary object of my invention is to so improve the form. and construction of locomotive boiler arches that bricks of definite shape and size shall be adapted for use in all locomotive boiler furnaces of a given type, and further, shall form an arch which shall so snugly fit the walls of'the furnace.

provide a front arch for locomotive boiler furnaces of such improved construction that small portions thereof may be removed to permit repairs to the side sheets without disrupting the essential part of the arch.

A further object of my invention is to provide a front arch, as mentioned, of such improved construction that a brick may be removed from the body of the arch, should the same become broken, and replaced by another without disturbing or removing the remainder of the bricks in the row, as has i been necessary heretofore.

' Still further objects of my invention will nace having the usual arch tubes, in combination with a refractory hollow arch abutting the flue sheet and comprising a body portion laterally coextensive with the group of arch tubes and resting thereon, and margin or wing bricks extending substantially from the outer arch tubes to the flue sheets and adapted to close the spaces between the body portion of the arch and said side sheets.

My invention. further consists in novel constructions and arrangements of parts all as hereinafter fully described and particularly pointed out in the claims.

My invention will be more readily understood by reference to the accompanying drawings forming a part of this specification and in which;

Figure l is a horizontal section of a locomotive boiler furnace equipped with an arch embodying my invention; Fig. 2 is a vertical longitudinal section substantially upon the line 22 of Fig. 1 Fig. 3 is a cross section of the furnace on the line 83 of Fig. 2; Fig. 4- is a cross section on the line 4.-4 of Fig. 2; and Fig. 5 is a similar section on the lines 55 of the same figure.

Referring to the drawings, A, indicates the flue sheet, B, the side sheets, and C and D the rear and crown sheets respectively, of a locomotive boiler furnace, of which E is the grate. Extending longitudinally through the furnace are a plurality of arch tubes, H. These are arranged slantingly within. the furnace and support the refractory arch, N. p

The arch, N, in the preferred form illustrated in the drawings, is composed of a plurality of refractory bricks and comprises a front or base portion of substantially the width of the furnace, which rests against or abuts the flue sheet, A; a main or body portion resting against said base portion and composed of a plurality of similar bricks arranged in longitudinal rows, said body portion being of less width than the furnace and substantially coextensive with the group of arch tubes and resting thereon; and side rows of marginal bricks of greater width than the space between the body portion and the side sheets and constituting side keys to fit. the arch to the furnace. The front or base portion comprises a pair of similar corner bricks, n, having suitable air channels or ducts, n, communicating with the outer air through hollow tubes, m, extending through the front water leg of the boiler; and a middle or key brick, 12- which properly spaces the corner bricks, n, and which is provided with an extension of the ducts or channels, a. The bricks of this front or base portion may be properly termed footing bricks. The body portion of the arch is composed of three longitudinal rows of similar bricks, each having a regular trapezoidal cross section. The bricks of the two outer rows, a are arranged with their broad sides resting upon the tubes, H, and present upwardly and inwardly inclined edges, 15*, to receive and support the middle row of bricks, n, and the side or key bricks, a". The arch tubes H,

are arranged substantially beneath the inclined ends of the bricks, W, in order to support said bricks at the points where they receive the load of the superimposed bricks, n and a. As illustrated in this particular case, the middle row, a, is composed of inverted bricks of the same size and shape as the bricks of the rows, a The bricks comprising the rows, a and the row, W, are preferably provided with holes, 12 which register to form air ducts which convey air from the ducts, n, in the front corner bricks, n, to the rear or deflecting bricks, u

As before stated, the body of the arch is of less width than the furnace and the spaces between the edges of said body part and the side sheets, B, of the furnace, are closed by the bricks, n, arranged in rows resting against the outer ends of the lower corner bricks, 12. These bricks are of greater width than the spaces between the outer edges of the body portion and the side sheets, B, and rest upon the upwardly and inwardly inclined edges of said body portion and against respective side sheets. The bricks, n, are substant-ially wedge shaped in cross section and are preferably longer than the bricks, n, to the end that the arch, when in place, shall form a more perfect and rigid unit, the joints between the bricks, n, being intermediate of the joints between the bricks, a, each side brick abutting the ends of two or more transverse rows of bricks, a. This construction also facilitates the removal of a single broken brick from the body of the arch and the replacing of the same with a whole brick, without disturbing or disrupting a larger portion of the body, as any outer body brick may be gotten at by merely lifting out the wing bricks. By reference to the drawings it will be seen that any individual brick in the row, a, may be removed, following the removal of the adjacent marginal brick, n, and may be replaced by another brick without disturbing other bricks in the same body row or in the central row, a It is evident that any of the bricks of the row, a, may be removed and replaced without disturbing any of the other component members of the arch. Usually it is preferable to allow clearance between the sides of the arch and the side sheets, to keep said sheets at a uniform temperature throughout. Hence, I usually form the side or wing bricks with outwardly extending ears or projections, n, each brick having one such projection at or near each end to rest against the side sheets. In this way the arch contacts the side sheets only to the extent of the ends of the projections, n", which limited contact is not objectionable. lhese projections also facilitate the fitting of the arch to the furnace, especially when the side sheets are uneven or patched, as the outer ends thereof the arch and the side sheets.

oeaere may be readily chipped off to properly fit the bricks to the spaces between the edges of When the bricks, n, are in place they hold the bricks of the body portion of the arch so tightly together as to prevent vibration of the arch as a whole or of its component members, and hence prevent disintegration thereof. This fusible substance is in thin layers or films and is represented by those lines of the drawings that distinguish the several bricks one from another.

I prefer to arrange a nonfusible substance between the component members of the arch.

' This prevents fusion and any brick may be readily removed Without disturbing or breaking the other bricks. In order to get at the flue sheet, A,it is but necessary to remove the bricks which constitute the row, n These are readily lifted out of the way, and the space between the rows, n, is of sufficient size to admit a man. In like manner the bricks, a, may be removed and rested upon the body portion, and when thus removed, permit ready access to the stay bolts.

As various modifications of my invention will readily suggest themselves to any one skilled in the art, I do not confine my invention to the specific constructions herein shown and described.

I do not herein broadly claim the Wedge or looking brick construction as an independent invention; such claims appear in my copending divisional application No. $42,979,

.filed July 10, 1908.

Having thus described my invention, I

claim as new and desire to secure by Letters Patent-z a l. A locomotive bo ler furnace having arch tubes, in combination with a refractory hollow arch resting upon said tubes and comprising a transverse row of lower front or footing bricks abutting the flue sheet and also the side sheets of the furnace, said footing bricks containing inwardly and rearwardly extending air ducts, and a body portion composed of longitudinal rows of bricks risingfrom said lower front bricks and having suitable air, passages communicating with said ducts, said body portion being of less Width than the furnace, and rows of upwardly and outwardly inclined marginal members resting against and rising from the outer ends of said lower front bricks and substantially closing the spaces between said body portion and the side sheets of the furnace, substantially as described.

2. A locomotive boiler furnace, its flue sheet and side sheets in combination with a group of inclined arch tubes extending upwardly and rearwardly from said flue sheet, air tubes opening through said flue sheet, footing bricks resting upon said arch tubes and against said flue sheet in communication with said tubes, an intermediate brick held away from the flue sheet by the footing bricks a plurality of channeled bricks arranged in rows upon said arch tubes in communication with the channels of the footing bricks and two rows of wedge bricks resting against the side sheets, the lower wedge bricks resting upon respective footing bricks, substantially as described.

In testimony whereof, I have hereunto set my hand, this 3d day of May, 1907, in the presence of two subscribing witnesses.

CHARLES E. MOORE.

Witnesses:

JOHN R. LEFEVRE, A. W. NELSON. 

